Impulsivity and procrastination are highly correlated. Both have been attributed to a lack of self-control resulting in difficulties in achieving long-term goals. Liu and Feng have discovered that these behaviors are both linked to an overlapping region of the brain called the left dorsolateral prefrontal cortex. During brain scanning, measures of impulsivity and procrastination were negatively correlated with gray matter volume in this region. The identification of this region confirms the close association between impulsivity and procrastination; however, a causal relationship has yet to be found.